What is the role of reproductive isolation and in maintaining the integrity of the species? Give examples.

Reproductive isolation refers to a specific set of chromosomes specific to this species. Features of DNA determine the specifics of the appearance and structure of the species. To maintain reproductive isolation, a species must refrain from interbreeding with other species. When crossing occurs regularly, the set of chromosomes gradually changes. Accordingly, the reproductive isolation and integrity of the species are violated and new features appear in the representatives. For example, this is how breeds are formed in dogs.